SOME PROBLEMS OF SERVICE RELIABILITY OF VERTICAL STEEL CYLINDRICAL TANKS WITH COVERINGS WITH REGARD FOR ADHESION OF STORED PRODUCTS

For reduction of losses from evaporation from vertical cylindrical steel tanks for storage of petroleum and petroleum products various types of floating coverings are used. The article provides the classification of coverings with basic design features, with regard for floatation ability, stability, and resistance to flooding for the tanks of a ‘ђ‚‘’ type with a stationary roof.
On this basis the most topical problems for the service reliability enhancement of ђ‚‘ with coverings are defined. The conducted experimental research on petroleum and petroleum products on metal and foamed polyurethane surface are described. The dependences of adhesion factor on metal and foamed polyurethane coverings from a kinematical viscosity of petroleum and petroleum products are obtained.